The problem:
We needed to use different log4j.properties file for each context.

We have one library (directory.jar) which resides in tomcat's shared lib that uses log4j. We also have three contexts (core, admin & user contexts) that will be using log4j for logging too.

Initially, we put the log4j library in tomcat's shared lib, and specify log4j.properties for each context's web.xml. But we found out that only one context is able to initialize the log4j properly. The other two contexts doesn't seem to be able to use log4j properly.

This problem has actually happen quite a while for me. Everytime I plug in FirefoxPortable in my office PC, it will automatically install Java Quick Starter 1.0 extension on the first run. What annoy me the most is, this extension CANNOT be uninstalled from Firefox Extension menu, and it is NOT located in the extensions folder in Firefox Profile.